Patents by Inventor Akihiro Iwaizako

Akihiro Iwaizako has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4799740
    Abstract: An electropneumatic master controller for an electromagnetic straight air brake system for railway vehicles has a brake valve, brake solenoid valve, a release solenoid valve, and an electrical interface circuit. The electrical interface circuit includes a first and a second sensor and a first and a second comparator which are responsive to the pressure of the control line and straight air line to open and close the brake and release solenoid valves for applying and releasing the brake cylinder.
    Type: Grant
    Filed: December 15, 1987
    Date of Patent: January 24, 1989
    Assignee: Nippon Air Brake Co., Ltd.
    Inventors: Akihiro Iwaizako, Hiroshi Nishii, Seiki Maruta